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A031298
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Triangle T(n,k): write n in base 10, reverse order of digits.
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41
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0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 0, 1, 1, 1, 2, 1, 3, 1, 4, 1, 5, 1, 6, 1, 7, 1, 8, 1, 9, 1, 0, 2, 1, 2, 2, 2, 3, 2, 4, 2, 5, 2, 6, 2, 7, 2, 8, 2, 9, 2, 0, 3, 1, 3, 2, 3, 3, 3, 4, 3, 5, 3, 6, 3, 7, 3, 8, 3, 9, 3, 0, 4, 1, 4, 2, 4, 3, 4, 4, 4, 5, 4, 6, 4, 7, 4, 8, 4, 9, 4, 0
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OFFSET
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0,3
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COMMENTS
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According to the formula for T(n,1), columns are numbered starting with 1. One might also number columns starting with the offset 0, as to have the coefficient of 10^k in column k. - M. F. Hasler, Jul 21 2013
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LINKS
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FORMULA
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MATHEMATICA
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Table[Reverse[IntegerDigits[n]], {n, 0, 50}]//Flatten (* Harvey P. Dale, Mar 07 2023 *)
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PROG
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(Haskell)
a031298 n k = a031298_tabf !! n !! k
a031298_row n = a031298_tabf !! n
a031298_tabf = iterate succ [0] where
succ [] = [1]
succ (9:ds) = 0 : succ ds
succ (d:ds) = (d + 1) : ds
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CROSSREFS
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KEYWORD
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AUTHOR
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EXTENSIONS
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STATUS
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approved
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